50s, our government had a secret cold war fallout shelter, built in west virginia for the entire u.s. congress. >> we have preppers who are extraordinary wealthy. who are preparing for the end of the world. >> musician from nashville, prepping for a nuclear war with russia for the last 35 years. he's concerned his burper may not be deep enough underground to shield him from deadly gamma radiation after a nuclear blast. to ensure his safety he has purchased a salvage fuel tank to serve as a gamma rachelle ter. >> y2k was for many of the preppers who i speak to, a -- turning point where they started to prep. >> before the millennium celebration in 200 throw was concern about our technology crashing. >> the y2k had a silver lining because of the fact that so many were concerned about the switching of the calendar and the fact that there could be computer glitches meant that top programmers were assigned to ferret out all possible glimpses. >> david is a disabled truck driver. >> i'm preparing for an electro magnetic pulse that will disable the transportation system of the united states.